: This library lists the 2022 edition by Knigina. While downloading might be restricted, it is a reliable source for bibliographic info and legal access points.
: You can view a PDF fragment of the 3rd edition (Part 1), which includes actual test questions on spelling and grammar. : This library lists the 2022 edition by Knigina
If you need the complete set for the school year, they are quite affordable (often under 300 RUB) at major retailers: : This library lists the 2022 edition by Knigina